Look at the net result of a session to ascertain it’s value. If it makes them fit, OK, but at what cost? Will their form break down to such a degree that losses occur in MaxVel.
300+300 or 200+200+200 will give you controlled speed without the form technical lapses. It has shot and then longer recoveries and if administered properly, should wreck technique.
You’ve hit the nail on the head with the 5-6x200m session at 90% with 2-3min recoveries. There are athletes who will gut this out, but at what cost? Looked at specifically, for a 24.00 female 200m runner, those are being run at 26.6. That’s faster than her “come home time” for a 400.
Way to many US college programs are still Darwinian (ie: survival of the fittest). Talented people can overcome much more severe training in most cases.